초록 ▼

A metering apparatus and system for controlling the administration of IV fluids having a valve housing with a valving chamber therein. A rotatable valve body member is positioned within the valve chamber and a valve passageway of variable cross-sectional area is provided at either the chamber or on

A metering apparatus and system for controlling the administration of IV fluids having a valve housing with a valving chamber therein. A rotatable valve body member is positioned within the valve chamber and a valve passageway of variable cross-sectional area is provided at either the chamber or on the valve member. The effective area and length of the valve passageway interposed between the inlet and outlet to the valve is adjustable to regulate flow by moving the valve body relative to the valve member. Various accessories can be selectively attached to the basic valve configuration including a backplate which facilitates single-handed operation and an optional cover plate which may be secured to the backplate to provide security from patient tampering. In the preferred embodiment the valve housing and internal valve members are fabricated from dissimilar plastic materials of different hardness to improve the sealing therebetween.

대표청구항 ▼

A valve for establishing and maintaining predetermined administration flow rates in IV systems having a source of fluid connected to an administration needle via tubing, said valve comprising: (a) a housing of a first relatively hard plastic material defining a cylindrical valving chamber, said hous

A valve for establishing and maintaining predetermined administration flow rates in IV systems having a source of fluid connected to an administration needle via tubing, said valve comprising: (a) a housing of a first relatively hard plastic material defining a cylindrical valving chamber, said housing defining an inlet port and an outlet port communicating with said chamber; (b) a valving member rotatable within said valving chamber and having a valving surface defining a flow path, said valving member having an off position in which at least said inlet port is out of registry with said flow path, said valving member being of a second relatively softer plastic material, said valving member further having a node on the said valving surface conforming to the configuration of the inlet port and being in registry therewith in the off position whereby predetermined rotation of said valving member will displace said node from registry with said port establishing an ultra-low flow condition.